Sounds like a bad smps or bad display. I would try the smps, but if that doesn't do it the display costs as much as the tv most likely.
SOURCE: WHAT CAN I DO TO RESOLVE THIS MATTER--PLEASE HELP ME SOMEONE???
Are you using a cable box? If you are then it maybe setup incorrectly. If not, See if when you press the MENU button if the screen is filled. If it is ok then, then the plasma panel is good, but the video processing is possibly bad. Have you tried all video inputs? Let me know more info and i can assist more. Have a good one. Jay
SOURCE: black line down the left side of the screen
This is a bad panel. The panel is very expensive to replace. It would be cheaper to buy a new tv. Sorry about the bad news.
SOURCE: BOTTOM HALF OF SCREEN GOES BLACK R A MINUTE OR SO
remove the back of the tv.disconnect and reconnect the ribbon cables into your buffer pcb.if this does not correct the problem replace the buffer pcb in that location where the screen is going black.you also could have
a defective panel if the buffer pcb does not correct your problem.
SOURCE: Black shadow boxes on 46 in Samsung 46 in LCD HDTV.
Ur backlight video board is dying,must replaced to solved this problem.Part and labors about $500.
SOURCE: In my samsung 40
It could be the power supply causing this problem - puffed caps in the Power Supply and low voltage to the signal board. Have both checked.
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